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磨削加工中的自激振动是一种非常有害的现象,它使加工表面质量降低,并限制了生产率的进一步提高,长期来一直是生产中尚未很好解决的问题。可以通过不同的途径来改善磨削时所产生的自激振动,如合理选择磨削工艺参数及根据工件来选择砂轮,提高机床动态特性,采用消振装置或反向加振,变速磨削等。变速磨削即是从工艺角度出发,周期地按一定规律变更磨削时砂轮或工件的瞬时转速。 70年代开始发表了用砂轮变速的方法以抑制磨削自激振动的文章,但由于外圆磨削时砂轮转速很高,系统惯性很大,生产上推广应用有一定困难。此后,曾发表采用工件变速的方法以抑制自激振动的文章。本文试图分析磨削自激振动的发生及其特点,并在此基础上对变速磨削抑振的机理进行讨论,最后就
Self-excited vibration in grinding is a very detrimental phenomenon that reduces the quality of the machined surface and limits the further increase in productivity, which has long been a problem that has not been well solved in production. Through different ways to improve self-excited vibration generated during grinding, such as a reasonable choice of grinding process parameters and according to the workpiece to select the wheel, to improve the dynamic characteristics of the machine, the use of vibration suppression device or reverse vibration, variable speed grinding . Variable speed grinding is from the process point of view, periodically according to a certain law to change the grinding wheel or workpiece instantaneous speed. Since the 1970s, an article about the method of using the wheel speed to suppress the self-excited vibration of the grinding wheel has been published. However, due to the high rotating speed of the wheel during the cylindrical grinding, the inertia of the system is very large and it is difficult to promote the production. Since then, there have been published articles that use methods of work shift to suppress self-excited vibration. This paper attempts to analyze the occurrence of grinding self-excited vibration and its characteristics, and on this basis, the mechanism of variable speed grinding vibration suppression is discussed, and finally